Locking pin



FIG. 1 is a top, front, right perspective view of a locking pin showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a top, front, left perspective view of the locking pin shown in use with environment.

The broken lines depict portions of the article and environment that form no part of the claimed design. 

CLAIM The ornamental design for a locking pin, as shown and described. 